Slope Authentication Concealing Signal Power
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Solution Overview
Problem
Existing physical layer authentication technologies in wireless communications, such as Auth-SS and Auth-TDM, expose authentication information, making them vulnerable to tampering and analysis by hostile users, which compromises the security of signal transmission.
Innovation Solution
The proposed wireless communication method and device implement a 'slope authentication technology' (Auth-SLO) that divides signals into groups, adjusts power based on pre-agreed keys, and uses power parameter adjustment factors to conceal authentication information, ensuring that the signal transmission does not expose authentication details, thereby enhancing security and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional physical layer authentication technologies (Auth-SS, Auth-TDM) are used, then authentication functionality is achieved, but authentication information is exposed and vulnerable to hostile users
Solution Approach 1:
The patent changes the parameter domain by mapping authentication information into the power domain through power parameter adjustment factors. Instead of embedding authentication data directly in signal content (which exposes it), the system modifies signal power parameters according to pre-agreed keys, concealing authentication information within power variations that are imperceptible in the time and frequency domains.
Solution Approach 2:
The patent introduces power parameter adjustment factors as an intermediary mechanism between the transmitting and receiving devices. These factors serve as a mediator that carries authentication information indirectly through power modifications, allowing the receiving device to verify authenticity without directly exposing authentication data to potential eavesdroppers.
2Reliability
If authentication information is embedded in signals, then authentication is enabled, but signal bandwidth increases and security decreases
Solution Approach 1:
The patent merges authentication functionality with existing signal transmission by superimposing power parameter adjustments onto the original signal. Instead of adding separate authentication channels that would consume additional bandwidth, the system combines authentication information into the power characteristics of the existing signal, achieving authentication without increasing bandwidth requirements.
3Reliability
If power parameter adjustment factors are used to conceal authentication information, then security is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-agreeing on power parameter adjustment factors and mapping relationships between keys and power modifications before actual authentication occurs. This pre-computation and pre-agreement simplifies the real-time authentication process, as the devices only need to apply predetermined power adjustments rather than performing complex real-time analysis.
Data Source
AI summary
For wireless communication method, a to-be-transmitting signal is divided into (n+1) packets using a key pre-agreed to by a transmitter and a receiver, where n is a positive integer. The to-be-transmitted signal comprising a regular signal and a tag signal, said tag signal forming an authentication signal. When the difference between received amplitude values of the regular signal and tag signal fail to meet a first pre-determined requirement, a first power parameter adjustment factor is determined for the n packets preceding an (n+1)th packet and a second power parameter adjustment factor is determined for the (n+1)th packet, as well as an energy-limited condition of the to-be-transmitted signal power. The transmitted power of the respective (n+1) packets is then adjusted according to the corresponding power parameter adjustment factor before the to-be-transmitted signal is transmitted.